Greg, trying to convince anyone to upgrade their stuff is tough, specifically when what they have works. I will offer these two things since you're looking at them already. First off, the ST's are awesome and I would definitely give them a shot...you won't understand until you try them. Second, for the releaselook at something like a short 'n sweet. Personally I like it just becuase you don't ever have to take your eyes off the animal to hook your release on the string and it doesn't make any noise at all, because it doesn't open and close.

I guess the other argument to 'don't fix what ain't broke' is that 'you won't know if you like something better if you don't try something new.'